520 Prospect Place AKA 751 Classon Avenue

How does 520 Prospect Place AKA 751 Classon Avenue compare with other senior living community buildings in New York City?

The latest disclosures cover 296 senior living community buildings in New York City, out of 48,310 buildings citywide. 520 Prospect Place AKA 751 Classon Avenue's ENERGY STAR score of 11 compares with an average of 57 across the 229 that report a score; it scores higher than 12% of them and lower than 86%. Its site EUI of 174.9 kBtu/ft² is about 56% above the average of 112.0 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 13.5 kgCO₂e/ft² is about 58% above the group average of 8.5 kgCO₂e/ft².

At 118,230 sq ft, it is roughly in line with the average floor area of 108,590 sq ft for those buildings. Its 1975 construction date is close to the group's average year built (1974). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².

What does an ENERGY STAR score of 11 mean?

ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 11 means the building performs better than about 11% of its national peers. BuildingCensus bands the score into report-card grades; 11 falls in band D — lowest band (1–54). It sits 64 points below 75, the threshold for ENERGY STAR certification. In New York City, 43% of scored buildings are at 75 or above.

Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 520 Prospect Place AKA 751 Classon Avenue's 174.9 kBtu/ft² across 118,230 sq ft works out to about 20.7 billion Btu (6,060 MWh-equivalent) in 2024. Its source EUI of 300.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,321,150 kWh of electricity, 126,703 therms of natural gas and 36,135 thousand gallons of water for the year.

Which law requires 520 Prospect Place AKA 751 Classon Avenue to report its energy use?

520 Prospect Place AKA 751 Classon Avenue reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record nyc:49305792:2024). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.